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Top Pet-friendly Grassy Key Hotels

Rainbow Bend Resort

57784 Overseas Hwy Marathon FL

22 min walk from Dolphin Research Center

This pet-friendly, oceanfront hotel welcomes dogs for an additional fee. Nearby Sunset Park Beach is a good place to stretch your legs if you need a walk.

8/10 Very Good! (767 reviews)

Loved the beach area and view. Good breakfasts, too.

Reviewed on Nov 19, 2025

Grassy Flats Resort & Beach Club

58182 Overseas Hwy Marathon FL

14 min walk from Dolphin Research Center

This hotel is pet-friendly, allowing dogs with an additional fee. If you're going for a walk during your stay, swing by nearby Sunset Park Beach.

9.4/10 Exceptional! (344 reviews)

The pool is a garden paradise. The palm deck rooftop has amazing views. The staff all say the owner Matt is amazing and all the staff were overly gracious. Dinner was also amazing with a great bartender who asked us how things were. Water sports were an added bonus

Reviewed on Nov 21, 2025

Gulf View Waterfront Resort

58743 OVERSEAS HWY Marathon FL

4 min walk from Dolphin Research Center

Dogs and cats are welcome (fees apply) at this pet-friendly hotel offering pet-approved amenities, like a dog park. For a walk during your stay, seek out nearby ...

8.4/10 Very Good! (517 reviews)

Great property to stay!

Reviewed on Nov 18, 2025

See all 2,325 properties in Grassy Key

Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.